For me it’s the risk of bitcoin becoming very expensive and successful very quickly and a rise in targeted violence to steal people’s Bitcoin aka $5 wrench.

Some of the stories Lopp posts can be unnerving.

I think it’s a risk that increases with price but then can also be mitigated with new tools and technology like multisig / timelocks etc (where the tradeoff in complexity can make you more prone to error)

Overall however I think staying humble and under the radar is the best defence here beyond having guns etc.